Extraction of a dynamical correlation length in a superspin glass (2008)
Wandersman, Elie, Dupuis, V., Dubois, Emmanuelle, Perzynski, Régine, Nakamae, S., Vincent, Eric
In this paper we report on zero field cooled magnetization relaxation experiments on a concentrated frozen ferrofluid exhibiting a low temperature superspin glass transition. Using a method initially...
Extraction of a dynamical correlation length in a superspin glass (2008)
Wandersman, Elie, Dupuis, V., Dubois, Emmanuelle, Perzynski, Régine, Nakamae, S., Vincent, Eric
In this paper we report on zero field cooled magnetization relaxation experiments on a concentrated frozen ferrofluid exhibiting a low temperature superspin glass transition. Using a method initially...
Growth of a dynamical correlation length in an aging superspin glass (2008)
Wandersman, Elie, Dupuis, V., Dubois, Emmanuelle, Perzynski, Régine, Nakamae, S., Vincent, Eric
We report on zero field cooled magnetization relaxation experiments on a concen- trated frozen ferrofluid exhibiting a low temperature superspin glass transition. With a method initially developed...
Spin glass behavior in an interacting gamma-Fe2O3 nanoparticle system (2008)
Parker, D., Dupuis, V., Ladieu, F., Dubois, E., Perzynski, R., ...
In this paper we investigate the superspin glass behavior of a concentrated assembly of interacting maghemite nanoparticles and compare it to that of canonical atomic spin glass systems. ac versus...
Spin glass behavior in an interacting gamma-Fe2O3 nanoparticle system (2008)
Parker, D., Dupuis, V., Ladieu, F., Dubois, E., Perzynski, R., ...
In this paper we investigate the superspin glass behavior of a concentrated assembly of interacting maghemite nanoparticles and compare it to that of canonical atomic spin glass systems. ac versus...
Spin glass behavior in an interacting gamma-Fe2O3 nanoparticle system (2008)
Parker, D., Dupuis, V., Ladieu, F., Dubois, E., Perzynski, R., ...
In this paper we investigate the superspin glass behavior of a concentrated assembly of interacting maghemite nanoparticles and compare it to that of canonical atomic spin glass systems. ac versus...
Growth of a dynamical correlation length in an aging superspin glass (2008)
Wandersman, Elie, Dupuis, V., Dubois, Emmanuelle, Perzynski, Régine, Nakamae, S., Vincent, Eric
We report on zero field cooled magnetization relaxation experiments on a concen- trated frozen ferrofluid exhibiting a low temperature superspin glass transition. With a method initially developed...
Growth of a dynamical correlation length in an aging superspin glass (2008)
Wandersman, Elie, Dupuis, V., Dubois, Emmanuelle, Perzynski, Régine, Nakamae, S., Vincent, Eric
We report on zero field cooled magnetization relaxation experiments on a concen- trated frozen ferrofluid exhibiting a low temperature superspin glass transition. With a method initially developed...
Deviations from Perfect Memory in Spin Glass Temperature Cycling Experiments (2006)
Sasaki, M., Dupuis, V., Vincent, E.
We study the deviations from perfect memory in negative temperature cycle spin glass experiments. It is known that the a.c. susceptibility after the temperature is raised back to its initial value is...
Aging in a topological spin glass (2006)
Wills, A.S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
Using a combination of static and time dependent magnetic susceptibility measurements we have examined the nonconventional spin glass phase of the 2-dimensional kagomé antiferromagnet...
Aging phenomena in spin glass and ferromagnetic phases: Domain growth and wall dynamics (2006)
Vincent, E., Dupuis, V., Alba, M., Hammann, J.
We compare aging in a disordered ferromagnet and in a spin glass, by studying the different phases of a reentrant system. We have measured the relaxation of the low-frequency {\it ac} susceptibility...
Comparative review of aging properties in spin glasses and other disordered materials (2006)
Hammann, J., Vincent, E., Dupuis, V., Alba, M., Ocio, M.
Aging phenomena have been studied in very different materials like polymers, supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and...
Thirion, C., Wernsdorfer, W., Jamet, M., Dupuis, V., Melinon, P., Perez, A., ...
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting...
Aging and memory properties of topologically frustrated magnets (2005)
Dupuis, V., Vincent, E., Hammann, J., Greedan, J. E., Wills, A. S.
The model 2d kagome system (H3O)Fe3(SO4)2(OH)6 and the 3d pyrochlore Y2Mo2O7 are two well characterized examples of low-disordered frustrated antiferromagnets which rather then condensing into spin...
Aging in a topological spin glass (2005)
Wills, A. S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
We have examined the nonconventional spin glass phase of the 2-dimensional kagome antiferromagnet (H_3 O) Fe_3 (SO_4)_2 (OH)_6 by means of ac and dc magnetic measurements. The frequency dependence of...
Experimental investigation of superspin glass dynamics (2005)
Parker, D., Ladieu, F., Vincent, E., Mériguet, G., Dubois, E., Dupuis, V., ...
Magnetic nanoparticle assemblies in high concentrations can exhibit spin glass like properties in the low temperature phase due to the influence of strong dipolar interactions. To address the...
Mériguet, G., Dubois, E., Bourdon, A., Demouchy, G., Dupuis, V., Perzynski, R.
The structure and dynamics of concentrated aqueous magnetic fluids with tunable interparticle interaction are investigated by small angle neutron scattering and forced Rayleigh scattering. The...
Rotational dynamics of a ferrofluid near its hlass transition (2005)
Wandersman, E., Dupuis, V., Dubois, E., Mériguet, G., Perzynski, R.
Slow dynamics and aging in glassy magnetic fluids (2005)
Dupuis, V., Wandersman, E., Robert, A., Mériguet, G., Dubois, E., Perzynski, R.
Dynamical properties of ferrofluids in zero and applied magnetic fields (2005)
Mériguet, G., Dubois, E., Dupuis, V., Farago, B., Perzynski, R.
Aging, rejuvenation and memory phenomena in spin glasses (2004)
Dupuis, V., Bert, F., Hammann, J., Ladieu, F., Parker, D., ...
In this paper, we review several important features of the out-of-equilibrium dynamics of spin glasses. Starting with the simplest experiments, we discuss the scaling laws used to describe the...
Ladieu, F., Bert, F., Dupuis, V., Vincent, E., Hammann, J.
The magnetisation relaxations of three different types of geometrically frustrated magnetic systems have been studied with the same experimental procedures as previously used in spin glasses. The...
Experimental investigation of superspin glass dynamics (2004)
Parker, D., Ladieu, F., Vincent, E., Mériguet, G., Dubois, E., Dupuis, V., ...
Spin Anisotropy and Slow Dynamics in Spin Glasses (2003)
Bert, F., Dupuis, V., Vincent, E., Hammann, J.
We report on an extensive study of the influence of spin anisotropy on spin glass aging dynamics. New temperature cycle experiments allow us to compare quantitatively the memory effect in four...
Phenomenes de vieillissement, rajeunissement et memoire: l'exemple des verres de spin (2002)
Dupuis, V., Vincent, E., Bert, F., Herisson, D., Hammann, J., Ocio, M.
The spin glasses are disordered and frustrated magnetic systems. They show aging phenomena which are also a characteristic feature of structural glasses, polymers, dielectrics, colloids, etc. Under a...
Deviations from Perfect Memory in Spin Glass Temperature Cycling Experiments (2002)
Sasaki, M., Dupuis, V., Vincent, E.
We study the deviations from perfect memory in negative temperature cycle spin glass experiments. It is known that the a.c. susceptibility after the temperature is raised back to its initial value is...
Aging, rejuvenation and memory effects in re-entrant ferromagnets (2002)
Dupuis, V., Vincent, E., Alba, M., Hammann, J.
We have studied the slow dynamics of the ferromagnetic phases of the re-entrant CdCr_{2x}In_{2-2x}S_4 system for 0.85
Aging and memory properties of topologically frustrated magnets (2001)
Dupuis, V., Vincent, E., Hammann, J., Greedan, J. E., Wills, A. S.
The model 2d kagome system (H3O)Fe3(SO4)2(OH)6 and the 3d pyrochlore Y2Mo2O7 are two well characterized examples of low-disordered frustrated antiferromagnets which rather then condensing into spin...
Thirion, C., Wernsdorfer, W., Jamet, M., Dupuis, V., Melinon, P., Perez, A., ...
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting...
Aging, rejuvenation and memory effects in Ising and Heisenberg spin glasses (2001)
Dupuis, V., Vincent, E., Hammann, J., Ito, A., Katori, H. Aruga
We have compared aging phenomena in the Fe_{0.5}Mn_{0.5}TiO_3 Ising spin glass and in the CdCr_{1.7}In_{0.3}S_4 Heisenberg-like spin glass by means of low-frequency ac susceptibility measurements. At...
Aging and memory properties of topologically frustrated magnets (2001)
Dupuis, V., Vincent, E., Hammann, J., Greedan, J. E., Wills, A. S.
The model 2d kagome system (H3O)Fe3(SO4)2(OH)6 and the 3d pyrochlore Y2Mo2O7 are two well characterized examples of low-disordered frustrated antiferromagnets which rather then condensing into spin...
Thirion, C., Wernsdorfer, W., Jamet, M., Dupuis, V., Melinon, P., Perez, A., ...
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting...
Thirion, C., Wernsdorfer, W., Jamet, M., Dupuis, V., Melinon, P., Perez, A., ...
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting...
Aging and memory properties of topologically frustrated magnets (2001)
Dupuis, V., Vincent, E., Hammann, J., Greedan, J. E., Wills, A. S.
The model 2d kagome system (H3O)Fe3(SO4)2(OH)6 and the 3d pyrochlore Y2Mo2O7 are two well characterized examples of low-disordered frustrated antiferromagnets which rather then condensing into spin...
Magnetic Anisotropy of a Single Cobalt Nanocluster (2001)
Dupuis, V., Jamet, M., Mailly, D., Thirion, C., Wernsdorfer, W.
Interface magnetic anisotropy in cobalt clusters embedded in a platinum or niobium matrix (2000)
Jamet, M., Negrier, M., Dupuis, V., Tuaillon-Combes, J., Melinon, P., Perez, A., ...
A low concentration of cobalt clusters with a fcc structure and containing almost one thousand atoms are embedded in two different metallic matrices: platinum and niobium. Samples have been prepared...
Magnetic Anisotropy of a Single Cobalt Nanoparticle (2000)
Jamet, M., Wernsdorfer, W., Thirion, C., Mailly, D., Dupuis, V., Melinon, P., ...
Using a new microSQUID set-up, we investigate magnetic anisotropy in a single 1000-atoms cobalt cluster. This system opens new fields in the characterization and the understanding of the origin of...
Structure and Magnetism of well-defined cobalt nanoparticles embedded in a niobium matrix (2000)
Jamet, M., Dupuis, V., Melinon, P., Perez, A., Wernsdorfer, W., Traverse, A., ...
Our recent studies on Co-clusters embedded in various matrices reveal that the co-deposition technique (simultaneous deposition of two beams : one for the pre-formed clusters and one for the matrix...
Aging in a topological spin glass (2000)
Wills, A. S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
We have examined the nonconventional spin glass phase of the 2-dimensional kagome antiferromagnet (H_3 O) Fe_3 (SO_4)_2 (OH)_6 by means of ac and dc magnetic measurements. The frequency dependence of...
Aging in a topological spin glass (2000)
Wills, A.S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
Using a combination of static and time dependent magnetic susceptibility measurements we have examined the nonconventional spin glass phase of the 2-dimensional kagomé antiferromagnet...
Aging in a topological spin glass (2000)
Wills, A.S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
Using a combination of static and time dependent magnetic susceptibility measurements we have examined the nonconventional spin glass phase of the 2-dimensional kagomé antiferromagnet...
Aging in a topological spin glass (2000)
Wills, A. S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
We have examined the nonconventional spin glass phase of the 2-dimensional kagome antiferromagnet (H_3 O) Fe_3 (SO_4)_2 (OH)_6 by means of ac and dc magnetic measurements. The frequency dependence of...
Aging in a topological spin glass (2000)
Wills, A. S., Dupuis, V., Vincent, E., Hammann, J., Calemczuk, R.
We have examined the nonconventional spin glass phase of the 2-dimensional kagome antiferromagnet (H_3 O) Fe_3 (SO_4)_2 (OH)_6 by means of ac and dc magnetic measurements. The frequency dependence of...
Comparative review of aging properties in spin glasses and other disordered materials (1999)
Hammann, J., Vincent, E., Dupuis, V., Alba, M., Ocio, M.
Aging phenomena have been studied in very different materials like polymers, supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and...
Comparative review of aging properties in spin glasses and other disordered materials (1999)
Hammann, J., Vincent, E., Dupuis, V., Alba, M., Ocio, M.
Aging phenomena have been studied in very different materials like polymers, supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and...
Comparative review of aging properties in spin glasses and other disordered materials (1999)
Hammann, J., Vincent, E., Dupuis, V., Alba, M., Ocio, M.
Aging phenomena have been studied in very different materials like polymers, supercooled liquids or disordered orientational crystals. We recall here the main features of aging in spin glasses, and...
Aging phenomena in spin glass and ferromagnetic phases: domain growth and wall dynamics (1999)
Vincent, E., Dupuis, V., Alba, M., Hammann, J.
We compare aging in a disordered ferromagnet and in a spin glass, by studying the different phases of a reentrant system. We have measured the relaxation of the low-frequency ac susceptibility, in...
Aging phenomena in spin glass and ferromagnetic phases: Domain growth and wall dynamics (1999)
Vincent, E., Dupuis, V., Alba, M., Hammann, J.
We compare aging in a disordered ferromagnet and in a spin glass, by studying the different phases of a reentrant system. We have measured the relaxation of the low-frequency {\it ac} susceptibility...
Aging phenomena in spin glass and ferromagnetic phases: Domain growth and wall dynamics (1999)
Vincent, E., Dupuis, V., Alba, M., Hammann, J.
We compare aging in a disordered ferromagnet and in a spin glass, by studying the different phases of a reentrant system. We have measured the relaxation of the low-frequency {\it ac} susceptibility...
Structural, vibrational and optical properties of silicon cluster assembled films (1998)
Melinon, P., Keghelian, P., Prevel, B., Dupuis, V., Perez, A., Champagnon, B., ...
Structure et magnétisme de super-réseaux Ru/Mn et MnFeMn/Ru préparés par MBE (1992)
Dupuis, V., Piecuch, M., Bobo, J., Baudelet, F., Fontaine, A., Bauer, J.
Pas de Résumé disponible
Structure et magnétisme de super-réseaux Ru/Mn et MnFeMn/Ru préparés par MBE (1992)
Dupuis, V., Piecuch, M., Bobo, J., Baudelet, F., Fontaine, A., Bauer, J.
Pas de Résumé disponible
Structure et magnétisme de super-réseaux Ru/Mn et MnFeMn/Ru préparés par MBE (1992)
Dupuis, V., Piecuch, M., Bobo, J., Baudelet, F., Fontaine, A., Bauer, J.
Pas de Résumé disponible
Localization effects in amorphous alloys under high magnetic field (1988)
Ousset, J.C, Broto, J.M, Rakoto, H, Dupuis, V, Durand, J, Marchal, G, ...
Magnetoresistance measurements on metallic amorphous alloys constitute a good tool to study Anderson localization effects in three dimensional systems. The authors have performed measurements under...
Ousset, J.C, Rakoto, H, Broto, J.M, Dupuis, V, Durand, J, Marchal, G, ...
The authors present measurements of the temperature dependence of the upper critical field Hc2 and of the magnetoresistance for V1-xSix superconducting amorphous alloys. Negative deviations from the...